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true

The meningeal branch of a spinal nerve actually reenters the vertebral canal to innervate the meninges and blood vessels.

true

In the somatosensory system there are no third-order neurons in the cerebellum.

false

There are 41 pairs of spinal nerves.

false

The glossopharyngeal nerve is the only cranial nerve that contains sensory fibers.

true

The musculocutaneous nerve is a major nerve of the brachial plexus.

true

The second cranial nerve forms a chiasma at the base of the brain for partial crossover of neural fibers.

true

The only cranial nerves to extend beyond the head and neck region are the vagus nerves.

false

The dorsal ramus consists only of motor fibers bringing information to the spinal cord.

true

Dermatomes are skin segments that relate to sensory innervation regions of the spinal nerves.

true

Spinal roots and rami are similar in that they both contain sensory and motor fibers.

true

Irritation of the phrenic nerve may cause diaphragm spasms called hiccups.

false

The obturator nerve branches from the sacral plexus.

false

Reciprocal inhibition means that while one sensory nerve is stimulated, another sensory neuron in the same area is inhibited and cannot respond.

true

External strabismus and ptosis could be caused by damage to the oculomotor nerve.

true

In order to regulate motor activity, to start and stop movements, and to coordinate postural movements, the cerebellum and basal nuclei are involved.

stretch reflex

The ʺknee jerkʺ reflex is an example of a(n) ________.

cervical

The ________ nerve is not a branch of the trigeminal nerve.

phrenic

Which of the following nerves does not arise from the brachial plexus?

CPG

Which of the following is at the lowest level of the CNS?

effector level

The three primary levels of neural integration in a sensory system include all of the following except the ________.

tibial

The posterior side of the thigh, leg, and foot is served by the ________ nerve.

rami, trunks, divisions, and cords (RTDC)

Starting at the spinal cord, the subdivisions of the brachial plexus are, in order ________.

accessory

The cranial nerve with a dual origin (brain and spinal cord) is the ________.

thoracic

Which of the following is not a nerve plexus?

femoral

A major nerve of the lumbar plexus is the ________.

sacral plexus

Spinal nerves exiting the cord from the level of L4 to S4 form the ________.

supplies innervation to the lateral rectus muscle of the eye

The abducens nerve ________.

may be modified by learned behavior

Basic reflexes ________.

There are always multiple synapses with chains of interneurons.

Which of the following is not true about the integration center of a reflex arc?

ulnar nerve

Striking the ʺfunny boneʺ is actually stimulation of the ________.

twelve thoracic

Which of the following numbers of pairs of spinal nerves is correct?

Only ventral rami form plexuses

Select the statement about plexuses that is most correct ________.

Golgi tendon reflex

A reflex that causes muscle relaxation and lengthening in response to muscle contraction is called a ________.

exteroceptors

Pressure, pain, and temperature receptors are ________.

nociceptors

Potentially damaging stimuli that result in pain are selectively detected by ________.

are mechanoreceptors

Meissnerʹs corpuscles ________.

nociceptors

Which receptors adapt most slowly?

lateral rectus muscle

The abducens nerve conveys proprioceptor impulses from the ________ to the brain.

afferent nerves

Nerves that carry impulses toward the CNS only are ________.

Schwann cells

After axonal injury, regeneration in peripheral nerves is guided by ________.

is complicated by secondary demyelination

Regeneration within the CNS ________.

extend

In a crossed extensor reflex, if the right arm were grabbed it would flex and the left arm would ________.

Pattern recognition allows us to see a familiar face.

Select the correct definition.

thalamus

All processing at the circuit level going up to the perceptual level must synapse in the ________.

common fibular and tibial

The sciatic nerve is a combination of which two nerves?

sacral plexus

The largest and longest nerve of the body is found in the ________.

cervical plexus

Irritation of a major nerve of this plexus may cause hiccups.

is characterized by paralysis of facial muscles

Bellʹs palsy ________.

when the great toe dorsiflexes and the other toes fan laterally

Babinskiʹs sign is ________.

receptor, afferent neuron, integration center, efferent neuron, effector

A simple spinal reflex goes along which of the following reflex arcs?

vestibulocochlear

Mixed cranial nerves containing both motor and sensory fibers include all except which of the following?

stimulus information to nerve impulses

Transduction refers to conversion of ________.

Touch

________ always takes a nonspecific ascending pathway.

musculocutaneous

The flexor muscles in the anterior arm (biceps brachii and brachialis) are innervated by what nerve?

trochlear

The cranial nerves that have neural connections with the tongue include all except the ________.

vestibulocochlear

Problems in balance may follow trauma to which nerve?

olfactory

A fracture of the ethmoid bone would result in damage to which cranial nerve?

Afferent nerve fibers contain cell bodies of sensory neurons.

Select the statement that is most correct.

sciatica

An improperly delivered gluteal injection could result in ________.

trigeminal

Which nerve does not use the jugular foramen as a route of exit from the skull?

sensory receptors

The peripheral nervous system includes ________.

Pacinian corpuscles

Feeling a gentle caress on your arm would likely involve all of the following except ________.

facial

A patient who received a blow to the side of the skull exhibits the following signs and symptoms on that side of the face: he is unable to close his eye, and the corner of his mouth droops. Which cranial nerve has been damaged?

cerebral cortex

The circuit level of the somatosensory system involves CNS centers in all of the following except the ________.

basal nuclei

The projection level of the brain does not include the ________.

a complete loss of voluntary movement

If the ventral root of a spinal nerve were cut, what would be the result in the tissue or region that nerve supplies?

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